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(No Model.) 4 Sheets-Sheet 1.

' L. WHITE. MACHINE FOR ROLLING SEAMLESS TUBES. No. 432,464. PatentedJuly 15, 1 890.

WITNESSES: $4705:

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(No Model.) 4 Sheets-Sheet 2.

L. WHITE. v MACHINE FOR ROLLING SBAMLESS TUBES.

No. 432,464. Patented Jul 15, 1890.

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By p W D r ATTORNEYS.

(No Model.) 4 Sheets--Sheet 3.

L. WHITE. MACHINE FOR ROLLING SBAMLESS TUBES. No. 432,464.

Patented July 15, 1890.

INVENTOR:

WITNESSES.

ATTORNEYS.

(N0 Model.) 4 Sheets-Sheet 4.

L. WHITE.

I MACHINE. FOR ROLLING SEAMLESS TUBES. No. 432,464. Patented July 15,1890.

WITNESSES. v "IVE/VITO: W W X MU/v UNITED STATES PATENT OFFICE.

LYMAbT WHITE, OF YVATERBURY, CONNECTICUT, ASSIGNOR TO RANDOLPH dzCLOWVES, OF SAME PLACE.

MACHINE FOR ROLLING SEAMLESS TUBES.

SPECIFICATION forming part of Letters Patent No. 432,464, dated July 15,1890.

Application filed December 4:, 1888. Renewed April 12, 1890. Serial No.347,591. (No model.)

To aZZ whom it may concern:

Be it known that I, LYMAN XVHITE, of \Vaterbury, in the county of NewHaven and State of Connecticut, have invented a new and usefulImprovement in Machines for Rolling Seamless Metal Tubes, of which thefollowing is a full, clear, and exact description.

My invention relates to an improvement in machines for rolling seamlessmetal tubes to from cylindrical castings, and has for its obj ect toprovide a machine of simple and effective construction, and a series ofrolls adapted for attachment to the machine and capable ofsimultaneously reducing and lengthening the z 5 castings to produce aperfect tube.

The invention consists in the combination and construction of theseveral parts of the machine adapted to carry said rolls, as will behereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters and figures of referenceindicate corresponding parts in all the 2 5 views.

Figure 1 is a plan View of the machine. Fig. 2 is a side elevation,partly broken away and disclosing the cable-drun1 and cable. Fig. 3 isan end view illustrating a partially-rolled 3o casting in position andthe mandrel in transverse section. Fig. 4. is a vertical section throughthe roll-head. Fig. 5 is a detail view illustrating a partially-rolledcasting upon the mandrel and the bearing of the rolls there- 5 of, thecasting being in section. Fig. 6 is a side elevation of a roll, andFigs. 7 and S are partial sections of modified forms of the rolls.

The frame of the machine consists of two parallel side pieces 10, whichside pieces are united by suitable webs 11 and provided near the top,upon their inner contiguous faces, with integral projecting. horizontalribs 12, adapted to form a seat or way for the longitudinal slidingcarriage 13, as best illustrated 4 5 in Fig. 3. The carriage is held inposition upon the side pieces 10 by means of tie-plates 14, secured tothe top of the side pieces by means of suitable tie-bolts 15, or in anyother approved manner.

At each end of the carriage 13, upon the under side and preferably atthe center, ears 16 are formed, in which ears the ends of a cable 17 arerigidly secured. The cable 17 is coiled upon a suitable cable-dru m 18,secured to a shaft 19, journaled in the side pieces of the frame at thecenter and transversely of the same, as best illustrated in Figs. 2 and3.

The cable-drum shaft 19 projects beyond one of the side pieces 10 of theframe, and upon the projecting extremity a worm-wheel 6o 20 is rigidlysecured, which worm-wheel is adapted to mesh with a worm 21, producedupon a line-shaft 22, as best shown in Figs. 1 and 3.- The line-shaft 22may be rotated in any suitable or approved manner.

Upon the upper face of the carriage 13, at or near the ends, a suitablestock or center post 23 is constructed the said center posts beingeither rigidly or adj ustably or detachably attached to said carriageand provided with the ordinary screw-points 24. The center points areadapted to hold the mandrel in position carrying the casting to berolled, as will be hereinafter fully described.

At or near the center of the frame, upon the 7 5 upper face, a roll-head25 is rigidly attached, which roll-head preferably consists of twocastings recessed upon the inner face, which castings are boltedtogether in any approved manner to produce an interior chamber 26, asbest illustrated in Fig. 4. The roll-head 25 may or may not be providedwith an opening 27 at the top as illustrated in the drawings.

In the center of the roll-head, transversely of the same, a circularopening 28 is produced, and at each side of the central opening and inhorizontal alignment therewith a horizontal slot 29 is formed in eachsection of the said head, and in the said slots 29 a bearing-block 30 isheld to slide, rendered adjustable through 0 the medium of a screw 31,passing through the sides of the head into the block, the outerextremity of which screw is provided with an attached hand-wheel 32, orequivalent device for conveniently manipulating the screw. In 5 thesliding blocks 30, at each side of the rollhead, a longitudinal shaft isjournaled, which shafts are carried rearward from the roll-head, and therear extremity of each shaft is held to revolve in suitable bearings 3stI00 rigidly attached to the rear end of the frame,

as best illustrated in Figs. 1 and 2. At the rear extremity of each ofthe said d rive-shafts 33 aspur-whecl 35 is secured, adapted to meshwith the lower gear 36, mounted upon a short main drive-shaft 37,extending at a right an- 5 gle from the rear of the frame, as best shownin Figs. 1 and 2, which main drive-shaft 37 is provided with suitabledriving-pulleys 38. I do not, however, confine myself to this particularmeans for driving the shafts 53, as

I other equivalent mechanism may be substituted without departing fromthe spirit of this invention.

Above and below each of the horizontal slots 29 of the roll-head adiagonal slot 39 is I produced, in which bearing-blocks 40 are held bestshown in Figs. 4 and 5, the pinions upon the right being adapted to meshwith the spur-wheel 45, rigidly secured to the righthand shaft 33 withinthe roll-head, and the pinions upon the left mesh in like manner o witha similar spur-wheel 45, rigidlysecured to the left-hand shaft It willbe observed that, as the several shafts 50 and 43 are provided with twoadjustable bearings in the roll-head, the adjustment of the said shaftsmay be accurately and minutely accomplished.

Upon the outer forward end of each of the short shafts -13 the rolls 46are secured, adapted to reduce and form the tube. lly re ference to Fig.3 it will be observed that the rolls 46 are arranged quartering andequidistant from the center of the central rollhead opening 28.

The construction of the drawing-rolls is fully illustrated in Figs. 6,7, and 8, from which drawings it will be observed that the rear end isof greater diameter than the forward end, and that the two peripheralend surfaces a a are connected by a spiral in- 50 elined plane I), andthat the surface intervening the two end surfaces is spirally stepped.The plane of the spiral may be either parallel with the axis of theroll, as illustrated in Fig. 6, or may verge slightly toward the axis,

5 5 as shown in Fig. 7, or from the axis, as shown in Fig. 8. Thepurpose of this construction of the roll is to more readily drawin thetube while revolving and rolling it. The surfaces a and a of the rollare parallel with the axis of the same, and the diameter of the innerend surface a is such as just to meet the outer surface of the enrolledportion of the tube, while the diameter of the rear end surface (t issuch that it will finish the tube, or,

in other words, removeany irrcgularitiesleft therein by the spiralsurface of the roll. The cylindrical casting 47 to be extended andreduced is placed upon a mandrel 4R, provided with reduced extremitiesor neckstfl, and the said casting at one end is bent, rolled, orotherwise manipulated and lapped over the rear end of the mandrel, asbest illustrated at 50 in Fig. 5. The mandrel, with the tube upon it, isadapted to pass through the center opening 28 of the roll-head, and isheld in a horizontal position parallel with the sliding carriage 13 bymeans of the centering screws of the center posts 23, as bestillustrated in Figs. 1 and 2.

In operation the close-fitting cylindrical casting 47 is placed upon themandrel 4S, and

the rear end of the mandrelis passed through the aperture 28 of theroll-head and supported by the centers. The drum-shaft 19 is thenmanipulated to cause the carriage 13 to travel rearward, whereupon therear end of the casting is brought in contact with the pcripheralsurface a of the roll, and the said roll being revolved will in turnrevolve both the casting and the mandrel, and owing to the peculiar formof the said rolls above dcseribcd and by the assistance of the cableattached to the carriage the two are passed through the head between therolls and reduced in thickness and elongated thereby, as illustrated inFig.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters Patent, is-

The combination, with the mandrel, of a head having drawing-rollsjournaled therein, with their axes parallel with the mandrel, eachroller having its surface formed into a spiral inclined plane and havinga cylindrical end surface at thebase of the inclined plane and intowhich said inclined plane vanishes, substantially as set forth.

2. The combination, with the mandrel, of ahead having conicaldrawing-rolls journaled therein, with their axes parallel with themandrel, and each roll having a cylindrical end surface at the base ofthe cone and a spirallystepped surface leading from the smaller end ofthe roller and vanishing into said cylindrical surface, substantially asset forth.

The combination, with the mandrel, of a head having'conicaldrawing-rolls journaled therein, with their axes parallel with themandrel, and each roll having a cylindrical end surface at the base ofthe cone and a spirallystepped surface leading from the smaller end ofthe roller and vanishing into said cylindrical end, the said step beinginclined, substantially as set forth.

4:. The combination, with the frame and the reciprocating mandrel, ofthe head mounted on the frame and having an opening through which themandrel passes, reducing or compressing rolls journaled in the said headequidistant from the mandrel, and gearing for to tating said rolls,substantially as set forth.

5. The combination, with a reciprocating mandrel, of a stationaryheadand a series of redncing-rolls journaled in the said head around IIOsaid mandrel and having their peripheral surface in two diametersconnected by a spiral inclined plane, all combined for operation,substantially as shown and described.

6. The combination, with a horizontally-reciprocating mandrel, and afixed head provided with adjustable bearings located in a planetransverse to the axis of the mandrel, of reducing-rolls journaled insaid adjustable bearings around the mandrel, said rolls having theirperipheral surface in two diameters connected by a spiral inclinedplane, and means, substantially as shown and described, for revolvingsaid rolls, as and for the purpose specified.

7. The combination, with a horizontally-reciprocating carriage providedwith center posts, and a fixed head vertically extending above saidcarriage and provided with a series of adjustable bearing-blocksequidistant from the central opening of the head, of a series ofreducing-rolls journaled in the said bearing-blocks around the openingin the head, said rolls having a peripheral surface,

two diameters connected by a spiral inclined plane, a mandrel heldbetween the center posts of the carriage and passing through the centralopening of the head,and means, substantially as shown and described, forreciprocating the carriage and revolving the said rolls, as and for thepurpose specified.

8. The combination, with the frame, areciprocating carriage providedwith center posts, and the mandrel held thereby, of a head on the frametransverse to the mandrel and havin g a con tral opening through whichthe mandrel passes, bearing-blocks in the head equidistant around saidmandrel, compressing or redncingrolls journaled in said blocks, andmeans, substantially as described, for reciprocating the carriage androtating the rolls, substantially as set forth.

9. The combination, with the mandrel, of the stationary head throughwhich the mandrel passes, rolls journaled in said head, with their axesparallel and provided with pinions, and parallel shafts having pinionson their inner ends meshing into the roll-pinions, substantially as setforth.

10. The combination, with the frame and "the roll-carrying head, of thereciprocating carriage having center posts, a mandrel held between saidposts, a cable connected to the ends of the carriage, a drum aroundwhich the cable is wound, and a worm-gearing for rotating the drum,substantially as set forth.

LYMAN lVHlTE.

\Vitnesses:

LUOIEN F. BURPEE,

STEPHEN W. KELLOGG.

